RECUPERATIVE SPRING-HYDRAULIC FIFTH-WHEEL COUPLING OF ROAD TRAIN Russian patent published in 2020 - IPC B62D53/08 

FIELD: transportation.

SUBSTANCE: invention relates to devices for coupling semitrailer with tractor. Recuperative spring-hydraulic fifth-wheel coupling of road train includes, in a semitrailer arranged in the frame, between the crosswise front and rear beams guides, a body consisting of a support plate, from below of which a pin is fixed, and from above are longitudinal and transverse plates. Between the longitudinal plates the braces are fixed. Body of the device is reciprocally moved along the semi-trailer longitudinal axis by means of guides. Sliding device body in guides is carried out by means of bushings. Front and rear springs resting by one ends on the front and rear sides of the braces are fitted in the body of the device, while the other end faces are fitted in the front and rear flanges, the opposite ends of which are supported by the bushings in the front and rear beams of the semitrailer frame. Recuperative mechanism consists of hydraulic cylinders arranged inside rear springs. Pneumohydraulic accumulator is connected by means of pressure pipeline both with controlled safety valve and with adjustable pressure reducing valve.

EFFECT: broader functional capabilities of the fifth-wheel coupling device of the road train and higher efficiency of its operation.

1 cl, 4 dwg